System Precautions
CAUTION:
See the ANTI-LOCK BRAKE SAFETY PRECAUTIONS
article.
- DO NOT unplug or plug CAB connector with ignition switch in ON position. Before bleeding brake system or disconnecting any hydraulic brake component (including brake lines), depressurize ABS hydraulic system by turning ignition switch to OFF position, and depressing brake pedal at least 40 times.
- Unplug CAB and sensor block connectors before using an arc welder on vehicle. When painting vehicle, CAB and sensor block should be insulated or removed before placing vehicle in paint oven.
- Visually inspect ABS before performing any test. Ensure hydraulic system, normal brake system, charging system and battery are okay. Low battery voltage can cause faulty reading. If necessary, connect a battery charger, and apply slow charge. DO NOT fast charge battery.
- Ensure parking brake switch, all related electrical wiring, electrical connections and electrical grounds are okay.